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Finding the Fourth Proportional to 970.52, 1,338.80 and 655.36

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Solution

The fourth proportional to 970.52, 1,338.80 and 655.36 is: 904.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.52 : 1,338.80 = 655.36 : x
  2. Step 2: Convert to fraction form
    970.52/1,338.80 = 655.36/x
  3. Step 3: Cross multiply
    970.52x = 1,338.80 × 655.36
  4. Step 4: Simplify right side
    970.52x = 877,389.34
  5. Step 5: Solve for x
    x = 877,389.34/970.52
  6. Step 6: Final answer
    x = 904.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.